Frixion classic and fineline pens and refills
Frixion classic and fineline pens and refills is a range made by Pilot which can be used on fabrics. So produces a crisp and clear mark which goes on smoothly with no skipping. After quilting or sewing you simply place an iron close or onto the lines and it disappears away.
Both pens and refills have a combined gel ink and thermo ink. This makes the pens and refills heat erasable which means are removed by heat of an iron. The marks will reappear if the quilt or sewing gets any colder than -10 degree. This is part of the inherent chemistry of the ink combination.
It is important to note that Pilot did not design the pens for fabric and did not test them on fabric while developing the concept. Always pre test on fabric before use.